Original research paper. A superior preparation method for daidzein-hydroxypropyl-β-cyclodextrin complexes with...

Area of Science:

• Pharmaceutical Technology
• Materials Science
• Drug Delivery Systems

Background:

• Conventional Solution Stirring Method (CSSM) for preparing drug-cyclodextrin complexes can be inefficient.
• Daidzein, a bioactive compound, faces challenges with poor solubility and rapid release.
• Hydroxypropyl-β-cyclodextrin (HPβCD) is utilized to enhance daidzein's pharmaceutical properties.

Purpose of the Study:

• To investigate the advantages of the supercritical fluid (SCF) process over CSSM for daidzein-HPβCD complex preparation.
• To characterize the physicochemical properties and dissolution profiles of the prepared inclusion complexes.
• To evaluate the impact of SCF processing on daidzein solubility and release kinetics.

Main Methods:

• Preparation of daidzein/HPβCD inclusion complexes using both SCF and CSSM.
• Confirmation of complex formation using Fourier Transformed-Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM).
• Evaluation of particle size, inclusion yield, drug solubility, and dissolution profiles.

Main Results:

• SCF process yielded higher inclusion yield and improved daidzein solubility compared to CSSM.
• SCF-processed complexes exhibited extended daidzein dissolution (22.94% in 45 min) versus rapid release with CSSM (98.25% in 15 min).
• Characterization techniques confirmed the formation of daidzein/HPβCD inclusion complexes.

Conclusions:

• The SCF process is a superior method for preparing daidzein-HPβCD inclusion complexes.
• SCF processing enhances daidzein solubility and controls its release rate, preventing precipitation in the gastrointestinal tract.
• This improved formulation strategy holds potential for enhanced therapeutic efficacy of daidzein.